The Saga District Court on Friday rejected a suit seeking to block Kyushu Electric Power Co.'s plan to use plutonium-uranium mixed oxide fuel (MOX) at the Genkai power plant in Saga Prefecture.

"Any danger has not been proven," the court said as it handed down the nation's first ruling on the legality of burning the controversial fuel in reactors.

Kyushu Electric is waiting for the Nuclear Regulation Authority to approve its application to restart the Genkai plant's No. 3 reactor, which is designed to run on both MOX and standard uranium fuel.